Synthetic method for sorbitan octoate emulsifier
A technology for the synthesis of sorbitan caprylate and its synthesis method, which is applied in the field of synthesis of ester compounds in organic chemistry, and can solve the problem of mass fraction, mass stability and color gap, the difficulty in reducing the hydroxyl value to a qualified range, and the mass fraction of straight-chain esters Advanced problems, to achieve the effect of safety and gentle performance, lighter color, and equipment investment saving
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Embodiment 1
[0029] (1) Etherification: Add 637g of D-sorbitol, 3.2g of sodium hypophosphite, and 0.637g of a stannous oxide catalyst into the reactor in sequence, and slowly raise the temperature to 120°C. When D-sorbitol starts to melt, jog Stir, keep warm until melting is complete, continue to heat up to 160°C, and react at this temperature, distill off the water generated by the reaction, react for 7 hours, the degree of etherification reaches 0.8-1.1, cool the material to 60-90°C, and obtain sorbet Tan crude product 600g.
[0030] (2) Refining of ether compounds: After the material is cooled to 60-90°C, filter it directly to recover the metal tin catalyst, then add 5.8g of deionized water and 2.9g of granular magnesium silicate adsorbent, heat up to 90-110°C, The low-boiling point substances were removed, the temperature of the material was lowered to 60-90° C., and 560 g of refined sorbitan was obtained by filtration, the degree of etherification was 0.8-1.1, and the color was ≤100 H...
Embodiment 2
[0035] (1) Etherification: Add 600g of D-sorbitol, 13.2g of sodium hypophosphite, and 0.18g of stannous chloride catalyst in sequence in the reactor, and slowly raise the temperature to 120°C. When D-sorbitol starts to melt, press Stir dynamically, keep warm until melting is complete, continue to heat up to 210°C, and react at this temperature, distill off the water generated by the reaction, react for 12 hours, the degree of etherification reaches 0.8-1.1, cool the material to 60-90°C, and obtain Sorbitan crude product 560g.
[0036](2) Refining of ether compounds: After the material is cooled to 60-90°C, filter directly to recover the metal tin catalyst, then add 16.2g of deionized water and 10.8g of granular magnesium silicate adsorbent, heat up to 90-110°C, The low-boiling point substances were removed, the temperature of the material was lowered to 60-90° C., and 514.36 g of refined sorbitan was obtained by filtration, the degree of etherification was 0.8-1.1, and the col...
Embodiment 3
[0041] (1) Etherification: Add 600g of D-sorbitol, 7.8g of sodium hypophosphite, and 1.5g of stannous chloride catalyst in sequence in the reactor, and slowly raise the temperature to 120°C. When D-sorbitol starts to melt, jog Stir, keep warm until melting is complete, continue to heat up to 200°C, and react at this temperature, distill off the water generated by the reaction, react for 5 hours, the degree of etherification reaches 1.1, cool the material to 60-90°C, and obtain crude sorbitan Product 567g.
[0042] (2) Refining of ether compounds: When the temperature of the material is lowered to 60-90°C, filter directly to recover the metal tin catalyst, then add a certain amount of deionized water 12g, granular magnesium silicate adsorbent 7.8g, and heat up to 90-110°C ℃, remove the low boiling point substances therein, cool the material to 60-90 ℃, and filter to obtain 538.9g of refined sorbitan, the degree of etherification is 1.1, and the color is ≤100 Hazen.
[0043] (3...
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